Roller vibrator



July 8, 1941. A. w. MALL ROLLER VIBRATOR Filed July 8, 1938 3 Sheets-Sheet 1 INVENTOR. dMa/Mwmfi/fl/J 6W v I ATTORNEYS July 8, 1941. w, MALL 2,248,478

ROLLER vmmon Filed July 8, 193a s Sheets-Sheet 2 n m N w w INVENTOR.

W '1 6 ATTORNEYS July 8, 1941. A. w. MALL ROLLER VIB RATOR Filed July 8, 1938 3 sheetg sheet 3 IN VENTOR;

Wm m W Mu/f Patented July 8, 1941 UNITE 5 T11 NT, OFFICE 7 Claims.

My invention relates to vibrating mechanisms and similar devices.

My invention relates more particularly to surface vibrating devices of the type usually employed on the surface of floors, roads and similar places that are constructed of a semi-plastic or plastic such as unset cement or similar matter.

The principal object of the present invention is to provide a vibrating mechanism of the class described capable of being moved about over the surface of unset concrete or like plastic material on a floor orroad that is being built.

A further object of the invention is to provide an improved device of the class described which may be manually operated by a single operator.

A further Object of the invention is to provide an improved device of the class described with a cylindrical roller capable of having its Weight varied in accordance with the amount of pressure desired to be applied in the vibrating operthat the motor may be utilized as a weight for the vibrating means and at the same time be supported thereon in a manner to prevent to a great degree the transmission of vibrations from the vibrator to the motor.

A further object of the invention is to provide an improved construction of frame mounting of the swivel handle with the roller so that the handie and motor may be tilted as desired without affecting the efficiency of its operation.

A further object of the invention is to provide a horizontally disposed standard vibrator means axially of an enlarged roller which may be capable of construction to a desired weight.

Other objects and advantages will be more apparent from the following description wherein reference is had to the accompanying three sheets of drawings upon which Fig. 1 is a side elevational View of my improved roller vibrator;

Fig. 2 is a plan elevational view of the same mechanism shown in Fig. 1;

Fig. 3 is a front elevational view of the same with parts broken away in section to more clearly show other parts;

Fig. 4 is a vertical sectional view of the vibrator generally on the line l'! of Fig. 1.

In the embodiment of the invention which I have chosen to illustrate, in Figs. 1 and 2 I have shown a driving motor l0 adapted to be supported upon the three parallel rods l2, l4 and 16 which are connected between the side frame members is and 20. The motor It) may be of the usual type of electric motor suitable for the purpose provided and be connected by a suitable cable 22 with a switch box 24 supported upon one extension 26 of the operating handle 28.

The operating handle 28 has the two extensions 26 and 30 connected by a spot-Welding or other suitable fastening means to a pair of plate members 32 and 34 that are journalled upon the hub portions 36 of the cross-brace channel members 38 disposed between the opposite sides of the side frame members l8 and 20. The channel members are spot-welded or otherwise rigidly secured to the side frame members. The handle 28 may be angularly adjusted about the hub 36 and fastened in a desired angular position by means of a pin 46 adapted to pass through an opening 42 in the side frame member 20 and one of the several openings 44 in the plate 34.

The handle 28 may also be swung around to the right (Fig. 1), and by means of the pin 4!] which extends through the opening 42a, the unit can be moved around from the opposite side of the roller, the plate 34 being shown in dotted lines in this position in Fig. 1. This is for the purpose of using the roller vibrator in a room where it is desired to vibrate concrete right up into the corner, and it will be apparent that by shifting it around to either side as desired this action is expedited.

The motor Ill, as previously mentioned, is supported upon the parallel cross-frame members I 2, i4 and it. A bracket 46, secured to the upper end of the motor, may be connected by suitable bolt members 48 to rubber or other flexible strap members 50 so that the motor is suspended with some flexibility. In a similar manner the bracket 52, fixedly connected to the lower side of the motor, may be connected by bolt members 54 to a pair of rubber strap members 56 fastened about the cross-frame members M and i6. With this construction the motor is suspended from three separated points so that it is more or less removed from any vibration which may be transmitted from the vibrator proper upwardly through the frame member and to the motor.

The motor may be provided with the usual driving shaft 58 which is screw-threadedly connected to a stub shaft 60 that has a V-belt pulley 62 keyed or otherwise secured to its outer end. The construction which I provide may include a shaft housing 64 which extends through the hub 36 in the channel-shaped frame members. A rubber or other resilient collar 66, secured about the housing 64, is provided for the purpose of stabilizing the action of the shaft and preventing vibrations from being transmitted to the motor. The collar 66 may be held in posi tion against the vertical wall of the channels 38 by a pair of anchor clip members 65a. The pulley 62 may be enclosed with a suitable housing 68 which may extend downwardly and enclose a driving pulley 10 secured to one end of a stub shaft iii. A plurality of V-belts 14 form a driving connection between the motor and the stub shaft '52. The stub shaft 12 may be in driving connection with an elongated offset weight l6 which is provided at its opposite end with a stub shaft lil journalled in a suitable bearing 86 in the end of axle 82. A similar bearing 84 is provided at the pulley end of the offset weight.

The axle 82, which is hollow as shown, may be formed with a pair of bronze bearing collars 86 and 88 which are mounted in the bushing retainers 9B and 92. Felt washer seals 94 and 96 are provided adjacent the vertical walls 93 and I of the cylindrical roller I62. A hub cap Hi4 may be provided at the end of the bushing retainer to enclose the end of the axle 82. A suitable oil receptacle i118 may be secured to the hub cap.

Both of the bushing retainers are adapted to be mounted in rubber cushion rings I08 that are carried by a pair of split clamp members I secured to the lower end of the frame members I8 and 2G. The clamp members may be secured together by suitable bolts H2 and thus provide a bearing for the roller I92 and axle 82.

With the construction as thus provided it can be seen that when the motor Ill is started by means of shaft 68 and the driving connection through the pulleys to the stub shaft 12, the offset Weight 18 will be revolved at a high rate of speed within the hollow axle 82 of the roller [02. This will obviously produce a vibration or a vi bratory effect upon the comparatively large roller Hi2 so that as the same is being manually moved about over unset concrete it will have a tendency to compact and set the concrete with a vibratory action.

It will be observed that the construction provides that the pulley Ill drives only the vibrator member "l6 within the hollow axle 82, the axle itself being mounted in suitable journals to permit rolling the entire unit about over the concrete on the roller [12.

The cushion rings I28 which are provided in the insulator clamps H0 effectively absorb any vibrations which may otherwise be transmitted from the roller to the frame of the machine. It will be noted that the roller IE2 is hollow and is provided with an inlet I16 and a plug member I i 8 so that liquid such as water may be placed in the same to provide the desired amount of weight in the roller. Other material may also be placed in the roller, such as sand or any desirable material which is of sufficient weight to produce the desired result.

While I have illustrated and described a specific embodiment of the invention, it will be apparent to those skilled in the art that changes and modifications may be made in the actual details shown, and I do not desire to limit myself in any particular. Rather what I desire to secure and protect by Letters Patent of the United Etates is:

1. A vibrating apparatus comprising a roller adapted to ride upon a body of material to be vibrated, a frame, a hollow axle extending longitudinally through the roller connecting the same to the frame for rotation relative thereto, a weight journalled eccentrically within said axle, and a. motor carried by the frame exteriorly of the roller and operatively connected to said Weight at one end of the axle for revolving the same within the axle, whereby to develop vibrations which said roller is adapted to transmit to said body of material.

2. A roller vibrator comprising a frame, power means associated with said frame, a. roller adapted to be moved about over the material to be vibrated, a hollow axle extending longitudinally through said roller and rotatably connecting the same to the frame, a tube coaxially disposed within said hollow axle and driven by said power means at one end of the axle, and a weight secured eccentrlcally within said tube, said tube and said weight being adapted for high speed rotation within said hollow axle, whereby intense vibrations are imparted through the roller to the material being vibrated.

3. A vibrating apparatus comprising a roller adapted to ride upon a body of material to be vibrated, a frame, a hollow axle extending longitudinally through the roller connecting the same to the frame for rotation relative thereto, a weight journalled eccentrically within said axle, a motor carried by the frame exterlorly of the roller, an operative connection between the motor and weight including a drive shaft extending into one end of said hollow axle and adapted to revolve the weight within the axle whereby to develop vibrations which said roller is adapted to transmit to said body of material.

4. A vibrating apparatus for compacting plastic materials comprising a roller adapted to ride upon the body of material to be vibrated, a frame, a hollow axle extending longitudinally through the roller connecting the same to the frame for rotation relative thereto, vibration producing means located within the axle, a motor carried by the frame, and motion transmitting means extending between the motor and one end of the axle and operatively connected with the vibration producing means for actuating the vibration producing means.

5. A vibration producing apparatus comprising a roller adapted to ride upon a body of material to be vibrated, a frame, a hollow axle extending longitudinally through the roller connecting the same to the frame for rotation relative thereto, rotative vibration producing means located within the axle, and a motor carried by the frame exteriorly of the roller and operatively connected to the said vibration producing means at one end of the axle for revolving the same within the axle, whereby to develop vibrations which said roller is adapted to transmit to the said body of material.

6. A vibrating apparatus comprising a roller adapted to ride upon a body of material to be vibrated, a frame, a hollow axle extending longitudinally through the roller connecting the same to the frame for rotation relative thereto, a Weight journalled eccentrically within the axle and extending substantially the entire length thereof, and a motor carried by the frame exteriorly of the roller and operatively connected to said weight at one end of the axle for revolving the same within the axle, whereby to develop vibrations which said roller is adapted to transmit to said body of material.

'7. A vibrating apparatus comprising a roller adapted to ride upon a body of material to be vibrated, a frame, power means carried by the frame, a hollow axle extending longitudinally through the roller and rotatably connecting the same to the frame, a. tube coaxially disposed within said hollow axle, and driven by said power means at one' end of the axle, and a weight secured eccentrically within said tube and extending substantially the entire length thereof, said tube and weight being adapted for high speed rotation within said hollow axle, whereby vibrations are transmitted through the roller to the material being vibrated.

ARTHUR WILLIAM MALL. 

